Watford boss Javi Gracia made a name for himself in Spain by upsetting the likes of Barcelona and Real Madrid, and he's admitted he's got something special up his sleeve for the trip to Liverpool.

Gracia is not a manager who has a set way of playing, preferring to take each game as it comes and tinkering with his formation, style and tactics.

The most impressive evidence of this was a 1-0 victory at Barcelona when he was manager at Malaga - which was one of the results that saw him nicknamed the giantkiller - and it was evident at Arsenal last weekend.

Gracia played with two strikers - something he has only done once before - as he wanted to try and exploit the Gunners' adventurous full-backs on the counter-attack. Although Watford did not score, they had chances.

He is expecting an incredibly difficult 90 minutes and acknowledges that if they make the same mistakes they did against Arsenal that it will be 'impossible' to take anything from the game.

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But Gracia is not a man to sit back, or rest on his laurels: "I'm going to tell you, we'll do something different," he said when asked if he'll mix it up at Anfield.

He continued: "I know if we play an open game against Liverpool, we have a lot of chances to lose the game - I think.

"But we need to have a balance, to be able to defend but we need to attack as well. We need to look for the way we can hurt them in our attack.

"If you play this match thinking only about defending, you are going to lose for sure."

Against Arsenal, lapses in concentration cost them. For much of the opening hour, Watford were on top and they came out of the break quickly, dominating possession for the first 15 minutes and looking like they were in control of the game.

Watford must not give Liverpool the same space that they can Arsenal at tims (Getty Images)

The Gunners were ruthless on the counter-attack, though, doubling their lead through Pierre-Emerick Aubameyang and knocking the stuffing out of Watford. Liverpool's attacking threat is even greater than the Gunners. Between them, Sadio Mane, Roberto Firmino and Mohamed Salah have netted 68 goals this season, with Salah getting 32 of them.

"If we give them the same options we gave against Arsenal, it will be impossible to get points there," he explained.

"I think they are the sixth top scoring team in all the European leagues! We'll try to exploit their weakness.

"It's very important to minimise the mistakes. The best mentality is not starting the game and thinking about minimising the mistakes.